<template>
	<el-container>
		<el-aside width="300px" v-loading="menuloading">
			<el-container>
				<el-header>
					<el-input
						placeholder="输入关键字进行过滤"
						v-model="menuFilterText"
						clearable
					></el-input>
				</el-header>
				<el-main class="nopadding">
					<el-tree
						ref="menu"
						class="menu"
						node-key="id"
						:data="menuList"
						:props="menuProps"
						draggable
						highlight-current
						:expand-on-click-node="false"
						check-strictly
						show-checkbox
						:filter-node-method="menuFilterNode"
						@node-click="menuClick"
						@node-drop="nodeDrop"
					>
						<template #default="{ node, data }">
							<span class="custom-tree-node">
								<span class="label">
									{{ node.label }}
								</span>
								<span class="do">
									<el-button
										icon="el-icon-plus"
										size="small"
										@click.stop="add(node, data)"
									></el-button>
								</span>
							</span>
						</template>
					</el-tree>
				</el-main>
				<el-footer style="height: 51px">
					<el-button
						type="primary"
						size="small"
						icon="el-icon-plus"
						@click="add()"
					></el-button>
					<el-button
						type="danger"
						size="small"
						plain
						icon="el-icon-delete"
						@click="delMenu"
					></el-button>
				</el-footer>
			</el-container>
		</el-aside>
		<el-container>
			<el-main class="nopadding" style="padding: 20px" ref="main">
				<save ref="save" :menu="menuList"></save>
			</el-main>
		</el-container>
	</el-container>
</template>

<script>
let newMenuIndex = 1;
import save from "./save.vue";

export default {
	name: "settingMenu",
	components: {
		save,
	},
	data() {
		return {
			menuloading: false,
			menuList: [],
			menuProps: {
				label: (data) => {
					return data.meta.title;
				},
			},
			menuFilterText: "",
		};
	},
	watch: {
		menuFilterText(val) {
			this.$refs.menu.filter(val);
		},
	},
	mounted() {
		this.getMenu();
	},
	methods: {
		//加载树数据
		async getMenu() {
			this.menuloading = true;
			var res = await this.$API.system.menu.list.get();
			this.menuloading = false;
			this.menuList = res.data;
		},
		//树点击
		menuClick(data, node) {
			var pid = node.level == 1 ? undefined : node.parent.data.id;
			this.$refs.save.setData(data, pid);
			this.$refs.main.$el.scrollTop = 0;
		},
		//树过滤
		menuFilterNode(value, data) {
			if (!value) return true;
			var targetText = data.meta.title;
			return targetText.indexOf(value) !== -1;
		},
		//树拖拽
		nodeDrop(draggingNode, dropNode, dropType) {
			this.$refs.save.setData({});
			this.$message(
				`拖拽对象：${draggingNode.data.meta.title}, 释放对象：${dropNode.data.meta.title}, 释放对象的位置：${dropType}`,
			);
		},
		//增加
		async add(node, data) {
			var newMenuName = "未命名" + newMenuIndex++;
			var newMenuData = {
				parentId: data ? data.id : "",
				name: newMenuName,
				path: "",
				component: "",
				meta: {
					title: newMenuName,
					type: "menu",
				},
			};
			this.menuloading = true;
			var res = await this.$API.demo.post.post(newMenuData);
			this.menuloading = false;
			newMenuData.id = res.data;

			this.$refs.menu.append(newMenuData, node);
			this.$refs.menu.setCurrentKey(newMenuData.id);
			var pid = node ? node.data.id : "";
			this.$refs.save.setData(newMenuData, pid);
		},
		//删除菜单
		async delMenu() {
			var CheckedNodes = this.$refs.menu.getCheckedNodes();
			if (CheckedNodes.length == 0) {
				this.$message.warning("请选择需要删除的项");
				return false;
			}

			var confirm = await this.$confirm(
				"确认删除已选择的菜单吗？",
				"提示",
				{
					type: "warning",
					confirmButtonText: "删除",
					confirmButtonClass: "el-button--danger",
				},
			).catch(() => {});
			if (confirm != "confirm") {
				return false;
			}

			this.menuloading = true;
			var reqData = {
				ids: CheckedNodes.map((item) => item.id),
			};
			var res = await this.$API.demo.post.post(reqData);
			this.menuloading = false;

			if (res.code == 200) {
				CheckedNodes.forEach((item) => {
					var node = this.$refs.menu.getNode(item);
					if (node.isCurrent) {
						this.$refs.save.setData({});
					}
					this.$refs.menu.remove(item);
				});
			} else {
				this.$message.warning(res.message);
			}
		},
	},
};
</script>

<style scoped>
.menu:deep(.el-tree-node__label) {
	display: flex;
	flex: 1;
	height: 100%;
}
.custom-tree-node {
	display: flex;
	flex: 1;
	align-items: center;
	justify-content: space-between;
	font-size: 14px;
	height: 100%;
	padding-right: 24px;
}
.custom-tree-node .label {
	display: flex;
	align-items: center;
	height: 100%;
}
.custom-tree-node .label .el-tag {
	margin-left: 5px;
}
.custom-tree-node .do {
	display: none;
}
.custom-tree-node .do i {
	margin-left: 5px;
	color: #999;
}
.custom-tree-node .do i:hover {
	color: #333;
}

.custom-tree-node:hover .do {
	display: inline-block;
}
</style>
